Improvement in cotton-gin saws



THOMAS C. CRAVEN.

lHnprovemenin Cotlton-Gin Saws. 10.115,441. fyi.

fa/W

Patented May 30,1871.

`THOMAS o. GRAVEN, 0E PHILADELPHIA, PENNSYLVANIA, AssIGNoE T0 BARTON H.JENKS, 0F SAME PLACE.

flMPRovEMENT INcoT-roN-GIN sAws.

Specification forming part of Letters Patent No. 115,441, dated May30,1871.

To all whom it mag/concern:

Beit known that I, THoMAs C. CRAV'EN, of the city of,Philadelphia,.inthe State of Pennsylvania, have .invented a new and useful Improvementin Cotton-'Gin Saws, of which the following is a specification:

` In the drawing, Figure 1 represents a plan of my improved'saw-blade;Fig. 2, a diamet-A rical cross-section of the saine. A

To reduce the costof such saws it is desirable that theyT should be madewith dies rather. than by the usual process of hammering.

The difficulty has been that the saws struck up in dies have been liableto warp. To obviate the difficulty I corrugate the blade of the sawconcentrically, as shown.

I. olaim- As a new manufacture, a corrugated saw for cotton-girls,substantially as set forth.

, THOS. C. GRAVEN.

Witnesses WM. J. BURNS, J. M. OoLGAN.

